indexing
description: "[
Representation of a typeface.
Appearance is specified in terms of font family, height, shape and
weight. The local system font closest to the specification will be
displayed. A specific font name may optionally be specified. See `set_preferred_face'"
There are two available queries for a font height, height and height_in_points.
Changing one, changes the other accordingly. height is given in pixels while
height_in_points is in points or 1/72 of an inch. Using height_in_points ensures
that on different screen resolutions `Current' has the same physical size, although
the pixel height may differ to achieve this.
]"
legal: "See notice at end of class."
status: "See notice at end of class."
keywords: "character, face, height, family, weight, shape, bold, italic"
date: "$Date: 2006-03-22 23:29:03 -0800 (Wed, 22 Mar 2006) $"
revision: "$Revision: 57641 $"
class interface
EV_FONT
create
default_create
EV_ANY
require ANY
True
ensure then EV_ANY
is_coupled: implementation /= Void
is_initialized: is_initialized
default_create_called_set: default_create_called
is_in_default_state: is_in_default_state
make_with_values (a_family, a_weight, a_shape, a_height: INTEGER_32)
`a_family'`a_weight'`a_shape'`a_height'
require
a_family_valid: valid_family (a_family)
a_weight_valid: valid_weight (a_weight)
a_shape_valid: valid_shape (a_shape)
a_height_bigger_than_zero: a_height > 0
ensure
a_family_set: family = a_family
a_weight_set: weight = a_weight
a_shape_set: shape = a_shape
a_height_set: height = a_height
feature
char_set: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.char_set
data: ANY
EV_ANY
family: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.family
generating_type: STRING_8
ANY
generator: STRING_8
ANY
height: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.height
height_in_points: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.height_in_points
preferred_families: EV_ACTIVE_LIST [STRING_32]
family
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.preferred_families
result_not_void: Result /= Void
shape: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.shape
weight: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.weight
feature
frozen deep_equal (some: ANY; other: like arg #1): BOOLEAN
`some'`other'
ANY
ensure ANY
shallow_implies_deep: standard_equal (some, other) implies Result
both_or_none_void: (some = Void) implies (Result = (other = Void))
same_type: (Result and (some /= Void)) implies some.same_type (other)
symmetric: Result implies deep_equal (other, some)
frozen equal (some: ANY; other: like arg #1): BOOLEAN
`some'`other'
ANY
ensure ANY
definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.is_equal (other))
frozen standard_equal (some: ANY; other: like arg #1): BOOLEAN
`some'`other'
ANY
ensure ANY
definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.standard_is_equal (other))
frozen standard_is_equal (other: like Current): BOOLEAN
`other'
ANY
require ANY
other_not_void: other /= Void
ensure ANY
same_type: Result implies same_type (other)
symmetric: Result implies other.standard_is_equal (Current)
feature
ascent: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.ascent
conforms_to (other: ANY): BOOLEAN
`other'
ANY
require ANY
other_not_void: other /= Void
descent: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.descent
horizontal_resolution: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.horizontal_resolution
is_proportional: BOOLEAN
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.is_proportional
maximum_width: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.maximum_width
minimum_width: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.minimum_width
name: STRING_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result.is_equal (implementation.name)
same_type (other: ANY): BOOLEAN
`other'
ANY
require ANY
other_not_void: other /= Void
ensure ANY
definition: Result = (conforms_to (other) and other.conforms_to (Current))
string_size (a_string: STRING_GENERAL): TUPLE [INTEGER_32, INTEGER_32, INTEGER_32, INTEGER_32]
`a_string'
widthheight`a_string'
widthheight
`left_offset'
`right_offset'`a_string'`left_offset'
`right_offset'
`a_string'`left_offset'
`right_offset'width
require
not_destroyed: not is_destroyed
a_string_not_void: a_string /= Void
ensure
result_not_void: Result /= Void
bridge_ok: Result.item (1).is_equal (implementation.string_size (a_string).item (1)) and Result.item (2).is_equal (implementation.string_size (a_string).item (2))
string_width (a_string: STRING_GENERAL): INTEGER_32
`a_string'
require
not_destroyed: not is_destroyed
a_string_not_void: a_string /= Void
ensure
bridge_ok: Result = implementation.string_width (a_string)
positive: Result >= 0
vertical_resolution: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.vertical_resolution
width: INTEGER_32
require
not_destroyed: not is_destroyed
ensure
bridge_ok: Result = implementation.width
feature
set_data (some_data: like data)
`some_data'data
EV_ANY
require EV_ANY
not_destroyed: not is_destroyed
ensure EV_ANY
data_assigned: data = some_data
set_family (a_family: INTEGER_32)
`a_family'family
require
not_destroyed: not is_destroyed
a_family_valid: valid_family (a_family)
ensure
family_assigned: family = a_family
set_height (a_height: INTEGER_32)
`a_height'height
height_in_points
require
not_destroyed: not is_destroyed
a_height_bigger_than_zero: a_height > 0
ensure
height_assigned: height = a_height
set_height_in_points (a_height: INTEGER_32)
height_in_points`a_height'
height
require
not_destroyed: not is_destroyed
a_height_bigger_than_zero: a_height > 0
ensure
height_assigned: height_in_points = a_height
set_shape (a_shape: INTEGER_32)
`a_shape'shape
require
not_destroyed: not is_destroyed
a_shape_valid: valid_shape (a_shape)
ensure
shape_assigned: shape = a_shape
set_weight (a_weight: INTEGER_32)
`a_weight'weight
require
not_destroyed: not is_destroyed
a_weight_valid: valid_weight (a_weight)
ensure
weight_assigned: weight = a_weight
feature
frozen deep_copy (other: like Current)
copy`other'deep_twin
ANY
require ANY
other_not_void: other /= Void
ensure ANY
deep_equal: deep_equal (Current, other)
frozen deep_twin: like Current
ANY
ensure ANY
deep_equal: deep_equal (Current, Result)
frozen standard_copy (other: like Current)
`other'
ANY
require ANY
other_not_void: other /= Void
type_identity: same_type (other)
ensure ANY
is_standard_equal: standard_is_equal (other)
frozen standard_twin: like Current
`other'
ANY
ensure ANY
standard_twin_not_void: Result /= Void
equal: standard_equal (Result, Current)
frozen twin: like Current
`Current'
twincopycopy
ANY
ensure ANY
twin_not_void: Result /= Void
is_equal: Result.is_equal (Current)
feature
copy (other: like Current)
`Current'`other'
require ANY
other_not_void: other /= Void
type_identity: same_type (other)
ensure ANY
is_equal: is_equal (other)
frozen default: like Current
ANY
frozen default_pointer: POINTER
`POINTER'
`p'default
`p'`POINTER'
ANY
default_rescue
ANY
frozen do_nothing
ANY
is_equal (other: like Current): BOOLEAN
`other'
require ANY
other_not_void: other /= Void
ensure ANY
symmetric: Result implies other.is_equal (Current)
consistent: standard_is_equal (other) implies Result
feature
destroy
`Current'
EV_ANY
ensure EV_ANY
is_destroyed: is_destroyed
feature {ANY}
valid_family (a_family: INTEGER_32): BOOLEAN
`a_family'
EV_FONT_CONSTANTS
valid_shape (a_shape: INTEGER_32): BOOLEAN
`a_shape'
EV_FONT_CONSTANTS
valid_weight (a_weight: INTEGER_32): BOOLEAN
`a_weight'
EV_FONT_CONSTANTS
feature
io: STD_FILES
ANY
out: STRING_8
ANYtagged_out
ANY
print (some: ANY)
`some'
ANY
frozen tagged_out: STRING_8
ANYout
ANY
feature
operating_environment: OPERATING_ENVIRONMENT
ANY
feature
is_destroyed: BOOLEAN
`Current'
EV_ANY
ensure EV_ANY
bridge_ok: Result = implementation.is_destroyed
invariant
family_valid: is_initialized implies valid_family (family)
weight_valid: is_initialized implies valid_weight (weight)
shape_valid: is_initialized implies valid_shape (shape)
height_positive: is_initialized implies height > 0
height_in_points_positive: is_initialized implies height_in_points > 0
ascent_not_negative: is_initialized implies ascent >= 0
descent_not_negative: is_initialized implies descent >= 0
width_of_empty_string_equals_zero: is_initialized implies string_width ("") = 0
horizontal_resolution_non_negative: is_initialized implies horizontal_resolution >= 0
vertical_resolution_non_negative: is_initialized implies vertical_resolution >= 0
EV_ANY
is_initialized: is_initialized
is_coupled: implementation /= Void and then implementation.interface = Current
default_create_called: default_create_called
ANY
reflexive_equality: standard_is_equal (Current)
reflexive_conformance: conforms_to (Current)
indexing
copyright: "Copyright (c) 1984-2006, Eiffel Software and others"
license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
source: "[
Eiffel Software
356 Storke Road, Goleta, CA 93117 USA
Telephone 805-685-1006, Fax 805-685-6869
Website http://www.eiffel.com
Customer support http://support.eiffel.com
]"
end EV_FONT